Muffler cut-out for motor-cars.



N. A. PE'IRY` MUFFLER Curnou Foa MOTOR CARS,

APPLICATIONFILED MAR. l0. i916.

N. A. PETRY.

MUFFLER CUT-OUT FOR MOTOR CARS.

APPLICATION rlLED MAR.10. |916.

l 9g, l 59 l u Patented Feb. 6, 1917.

2 SHEETS-SHEET 2.

*Marianas A. remar, or PHILADELPHIA., PENNSYLVANIA.

MUFFLER CUT-OUT FOR MOTOR-CARS.

Specification of Letters Patent.

Patented Feb. 45, 193W..

Apr ication led March 10, 1916. Serial No. 83,255.

A. PETRY,

My invention'relates to that class of mui-` ier cut-outs in which acasing interposed in the exhaust pipe is provided with a. valveadjustable to cut ofi'. the muiiier and direct themthrough an outletinthe casing, or so as to close said outlet and permit the gases to flowthrough the casing to the muiiier, the object of my invention being tovsimplify and cheapen the construction and to improve the operation of amufller cut-out of this type.

, In the accompanying drawings Figure l is a longitudinal section of amufller cut-out constructed in accordance with my invention;

Fig. 2 is a perspective View of one half of the same, and of the valveremoved therefrom;

Fig. 3 is a 3 3, Fig. l;

Fig. is a transverse section on the line 4 4, Fig 1;

Fig. 5 is a transverse section on the line horizontal section on theline Fig. 6 is a side elevation of one half of a special form of casing,the valve used in connection therewith eng shown in section' Fig. 7 is atransverse section ofthe complete casing on the line 7 7 Fig. 6, and

Fig. 8 is a view similar to lFig. 3, but lllustrating still another typeof casing. The muffler cutout constructed in accorde ance with myinvention consists ofV a casing fitted at its opposite ends to theadjoining portions 11 11a of the exhaust pipe of the engine, throughwhich the travel, in the direction of the arrowa1 Flg. l, from theengine to the muffler mounted on the portion 1l*L of the exhaust pipe.

The interposed casing comprises a central member 12 of rectangular crosssection with longitudinally curved top and oppo# site end members 13 and13a of circular cross section for being fitted to the opposite members11 11a of the exhaust pipe, the central portion 12 of theA casingcontaining a chamber 12" having at the bottom adown flow of gases to theexhaust gases wardly nel 12". i

When the casing is composed of cast metal, it preferably consists ofopposite halves meeting on the central longitudinal line of andrearwardly discharging funthe casing,so that they can be cast withoutcores, the two halves of the cas.

the vuse of lng being secured `together and to the pipe sectlons 1n anysuitable manner, as for 1nstance by providing them with lugs 14 for thereception of clamping bolts.

Extending transversely across and projecting upwardly at an angle intothe chamber'l2a of the casing is a partition l5 hav ing, at its innerend, a segmental rib 16 with transverse opening extending through thesame for the reception of the hub member 17 of a valve plate 18 which,when so mounted in said rib, (and preferably also in bearings in theside plates of the casing) can be swung either upwardly to the positionshown by full lines in Fig. A'1, or downwardly to the position shown bydotted lines therein.

When the valve is inthe position shown by full lines it directs theexhaust gases from the pipe 11 downwardly through the chamber 12a belowthe partition 15 and out through the funnel 12b in the lowerportion ofthe casing, and when said valve is in the position shown by dotted linesit directs the exhaust gases upwardly through the chamber 12a over thetop of the partition 15 and into the mufiler pipe lla, the valve when ineither position deliecting the gases without any abrupt change in thedirection of flow and therefore without any material resistance to suchflow.

The deiector for the gases therefore combines a permanent member (theinclined partition 15) and an adjustable member (the valve 18) themember 15 acting constantly,- and the member 18 determining whether suchdeflection shall be over or under the permanent member 15.

The inclined partition 15 is preferably formed in one piece, integralwith on'e side of the central member 12 of the casing,A as shown in Fig.2, so as to dispense with any central joint in said can, withoutdeparting from the essential features of my invention, becomposed ofhalves each carried by its respective half of partition, although itlll@ A muier cut-out constructed in accordance with my invention iscomposed of but ievv parts which can be fitted together with` outexpensive machining and each of these parts can be cheaply produced. Astill' cheaper method of production can, as shown in Figs. G and 7, beadopted by making the opposite halves of the casing of pressed steel orother sheet metal, the central partition in such ease being' separatefrom the sides "oit the erasing' and being secured thereto b'y means ofay lange-Tormation 19 at either or both edges of said partition, whichliange can be secured to the respective side ol the casing by electricwelding or other simple means, the same means being enn'iloyed forsecuring in place a flange .20 which constitutes a seat Jfor the valve18 when the latter is in position to close the cut-out passage.

In order to facilitate the formation ot the hollow segmental rib at thetop edge of the partition When this method of manufacture is adopted,said partition is preferably com posed of two plates 15a and 151 iveldedor otherwise secured together and each havingf at its upper edge acurved flange 16lL or 16h constituting, respectively, `the upper orloner member of said segmental rib.

When the opposite halves of the casing are Composed of pressed metal, asdescribed, the two halves may be connected in any suitable Way, as forinstance by crimping together edge flanges on the opposite halves of thecasing, as shown in Fig. 7.

Another method of forming the casing' of the cut-out w'ithin the scopeoi my invention is to cast the same in one piece, as shown in Fig. 8,but. in such case, cores have to be employed in the mold and an opening21 will have vto be formed at one side of the casing' forthc insertionof the valve 1:8 and its hub 17, such opening be-I ing subsequentlyclosed by a plate 22. a

Preferably also, in this case, a similar opening with detachable closureis `provided c at the opposite side ofv the casing1 in order to permitready machining of the valve seats, ii the same is required.

When suiiicient bearing is provided in the opposite sides ot the casing1Q 'for the pivot hub 17 oi the swinging valve the segmental rib :it theinner end of the partition l5 may in some cases be omitted, such pivothub bearing against the inner end ot the partition to lorm a reasonably.tight joint therewith.

The projecting end of the pivot huh of the valve is intxnidcd to beprovided with an operatingr arm or lever whereby it can be readily swungto one position or the other, and such lever is prefcrablY acted upon bya suitable spring tending to move the valve 18 into position to closethe cut-out passage.

'.lhc curved top 12 of the' .casing is concentric ivitii. the easing ofthe seat for the -side ends-of the casing necting` member valve stem atthe inner end of the partition l5, hence. the area of the passage-12aabove the partition is, in all of its parts, equal to the area of thevalve seat at the forward end of the passage.

The hollow segmental rib 16 at the inner end of the partition 15 is inexcess of a semicircle so as to overlap the segmental rib 17 on thevalve and 'thus prevent radial removal ot' the valve from its seat inany position of adjustment of said valve.

When, as in a mulller cut-out, members for attachment to the mufflerpipe are at oppoand the cut-out at an anglev from the conthe use of theinclined inivardly projecting partition l5 permits of the formation of aportion of the cut-out passage within said connecting member,and thusreduces the sizeoil the latter and also its weight, as compared withthat of one having a cut-out passage wholly beyond the bottom of theconnecting member, While at the same time the use of the inwardlyinclined projecting partition reduces the radial projection of the valvebeyond its seat to such an extent that it is less than the diameter ofthe end members.

l claim:

1. A muier cut-out comprising a casing having a central member withlongitudinally projecting end members for application to the mufflerpipe, and a cut-ont branch projecting from said central member at anangle to the pipe receiving members, said central member also having aninwardly projecting,r transverse partition disposed at an angle to theaxial line of the end members, and a lswinging valve pivoted at theinner end oli said partition and adjustable to a position te close thethrough passage or to a position to close the cut-out branch, the`latter/` being formed partly within the centrall member of the casing.

2. A mulller cut-out comprising a Casin having a. central member withlongitudinally curved top and straight, sides, longitudinally projectingend members for application to the muffler pipe, and a cut-out branchprojecting -from said central member at an angle to the pipe receivingmembers, said central member also having an inwardly projecting inclinedtransverse partition, and a swinging valve pivotally mounted. at theinner end thereof, and free to assume a position substantially in linewith the partition for closing the longitudinal passage through saidcentral member or a position substantially at a right angle to theinclined partition for closing the entrance to the cut-out branch.

3. A muffler cut-out having a. casing comprising a central member withlongitudinally projecting end members for applicabranch projects tion.to the muffler pipe, a cut-out branch aso mirarse m projecting from saidcentral member at an angle to the pipe receiving members, an inL VWardlyprojecting inclined transverse partition and a valve pivotally mountedat the inner end of the latter and adjustable in respect thereto so as'either to close the muilier pipe and -open the cut-out branch or closethe cut-out branch and open the muier pipe, said casing being composedof laterally sepaf rable members and sa'iil inclined transversepartition extending across the casing from side to side and being formedintegrally with one of said laterally separable members.

4. A mufHer cut-out comprising a casing having a central member withlongitudinally projecting end members for application to the muiilerpipe, and a cut-out branch projecting at an wangle to said end members,said central member also having an in- Vjustable in respect thereto sovas either to close the muffler pipe and open the cut-out branch or closethe cut-out branch and open the muler pipe, that portion of the valvewhich projects beyond its seat on the partition being narrower radiallythan the diametr of the pipe receiving members.

In testimony whereof I have signed my name to thisfspeclticatlon 1n thepresence of two subscrlbmg witnesses.

NICHOLAS A. PETRY.

Witnesses:

KATE A. BEADLE, HAMILTON D. TURNER.

